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Zeroth Law of Thermodynamics01:14

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Experimentally, if object A is in equilibrium with object B, and object B is in equilibrium with object C, then object A is in equilibrium with object C. That statement of transitivity is called the "zeroth law of thermodynamics." For example, a cold metal block and a hot metal block are both placed on a metal plate at room temperature. Eventually, the cold block and the plate will be in thermal equilibrium. In addition, the hot block and the plate will be in thermal equilibrium.
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A thermodynamic process that occurs at constant temperature is called an isothermal process. Heat slowly flows into the system or out of the system to maintain thermal equilibrium. Processes involving phase changes like water evaporation into steam or freezing water into ice at a constant temperature are examples of Isothermal Processes.
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The Second Law of Thermodynamics states that entropy, or the amount of disorder in a system, increases each time energy is transferred or transformed. Each energy transfer results in a certain amount of energy that is lost—usually in the form of heat—that increases the disorder of the surroundings. This can also be demonstrated in a classic food web. Herbivores harvest chemical energy from plants and release heat and carbon dioxide into the environment. Carnivores harvest the...
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Le Chatelier's Principle: Changing Temperature02:19

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Consistent with the law of mass action, an equilibrium stressed by a change in concentration will shift to re-establish equilibrium without any change in the value of the equilibrium constant, K. When an equilibrium shifts in response to a temperature change, however, it is re-established with a different relative composition that exhibits a different value for the equilibrium constant.
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Fermi Level01:18

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Landauer's Principle at Zero Temperature.

André M Timpanaro1, Jader P Santos2, Gabriel T Landi2

  • 1Universidade Federal do ABC, 09210-580 Santo André, Brazil.

Physical Review Letters
|July 9, 2020
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Summary
This summary is machine-generated.

Researchers derived a new, tighter bound for heat dissipation related to entropy changes, which remains significant even at absolute zero temperature. This improved thermodynamic bound is universally applicable across all temperatures.

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Area of Science:

  • Thermodynamics
  • Statistical Mechanics
  • Information Theory

Background:

  • Landauer's principle connects system entropy changes to heat dissipation.
  • The original Landauer's bound becomes insignificant at zero temperature.
  • A need exists for a more universally applicable thermodynamic bound.

Purpose of the Study:

  • To derive a tighter thermodynamic bound for entropy-driven heat dissipation.
  • To ensure the bound's validity and non-triviality at absolute zero temperature (0 Kelvin).
  • To establish a bound superior to Landauer's at all temperatures.

Main Methods:

  • Theoretical derivation of a novel thermodynamic bound.
  • Analysis of the bound's behavior in the limit of zero and high temperatures.
  • No assumptions made about the system's state or interaction type, only a thermal environment.

Main Results:

  • A new bound is derived that is tighter than Landauer's bound.
  • The new bound remains nontrivial even as temperature approaches absolute zero (T→0).
  • The derived bound converges to Landauer's bound at high temperatures.

Conclusions:

  • The newly derived bound offers a more robust and universally applicable measure of thermodynamic cost in information processing.
  • This work extends the applicability of fundamental thermodynamic principles to extremely low temperatures.
  • The findings have implications for understanding energy dissipation in quantum systems and computation.